Car-spring



(No Model.)

G. W. MORRIS.

GAR SPRING.

No. 359,359. 'PatenteHMar. 15, 1887.

UNITED STATES PATENT OFFICE.

GEORGE WV. MORRIS, OF PITTSBURG, PENNSYLVANIA.

CAR-SPRING.

SPECIFICATION forming part of Letters Patent No. 359,359, dated March15, 1887.

Application filed December 28, 1886. Serial No. 222,818. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE W. MORRIS, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented new and useful Improvements in Oar-Springs,of which the following is a specification.

My invention relates to spiral or helical springs for railway-cars; andthe object of my improvement is to prevent the ringing sound whichresults from the sudden contact of the end coils of the spring upon eachother due to the jolting action of the car, and which in the service isvery annoying. The end coils of such springs are necessarily made fiat,to give a proper seating at the ends of the spring, and when the carsare in motion these flattened terminal coils yield quickly under thejolting action of the car and strike suddenly upon the next coil,producing an almost continuous ringing sound along the train. The remedyby which I avoid this objection consists in arated.

providing a contact-surface of some soft or dead metal between the firstand second coils of each end of the spring. This I prefer to do bycoating the contiguous surfaces of the first and second end coilspreferably with a thin layer of lead, because that metal is thecheapest; but I may use copper, Babbitt, or other dead metals. In suchapplication of the nonsounding metal to the end spring-coils the lattermay be united to each other or remain sep- I provide for the perfectunion and adhesion of the soft metal to the coils by treating the endcoils with a mixture of acids and zinc first, and then pour the moltenlead or other metal upon such prepared surface, and thus effect a solidsecure union of the two metals,

so that the soft metal cannot getloose and drop out. In applying thesoft-metal coating it should extend about half or two-thirds around thecoils from the point of the end coil. It

may be applied in the form of a tube to' the flattened end coil, and thecontiguous surface face; but a surface coating of such metal, how- 0ever thin, will deaden the spring as if it were solid. I

In the drawings, I have shown in Figures 1 and 2, in elevation, twoforms of coiledsprings,

in which a represents the dead or n0n-sounding metal interposed betweenthe two outer coils for about half around the end coil from its flatend. Figs. 3, 4, and 5 are sectional details.

In practice I consider the coating with soft metal the best way ofcarrying my improvement into effect, and to make such coating only ofsuch thickness as to deaden the sound. This non-sounding surface isapplied after the spring is made, and the soft metal may be 6 poured orapplied in any suitable way to the spring-coils.

I claim- 1. The end coils of a spiral or helical spring renderednon-sounding by the interposition of 7c some soft dead metal, asdescribed.

2. The first and second end coils of a spiral or helical spring coatedon their contiguous surfaces for about half or two-thirds around fromthe point of the end coil with lead or other suitable soft dead metal,as described.

3. The end coils of aspiral or helical spring rendered non-sounding bymeans of a surface coating of soft metal applied thereto with a mixtureof acids and zinc, as described, and

for the purpose stated.-

In testimony whereof I havehere'unto set my hand in the presence of twosubscribing witnesses.

' GEO. W. MORRIS. Witnesses:

FRED DARGER, ROBERT FARLEY.

